Facile synthesis of cobalt oxide and graphene nanosheets nanocomposite for aqueous supercapacitor application

Carbon Trends

卷:7

Rahul Kumar¹  Dhirendranath Thatoi²  Ankur Soam²  Rajan Lakra²  Prasanta Kumar Sahoo²  Deepanshu Sharma³ 

[1]Department of Energy Science and Engineering, IIT Delhi, New Delhi, 110016, India.

[2]|Department of Mechanical Engineering, Siksha ‘O’ Anusandhan, Deemed to be University, Bhubaneswar, 751030, India

[3]|Department of Physics, IIT Delhi, New Delhi, 110016, India.

关键词: Cobalt oxide;    Graphene;    Nanocomposite;    Electrode;    Supercapacitor;   

DOI  :  

来源: DOAJ

【 摘 要 】

The present work includes the fabrication and electrochemical characterization of cobalt oxide (Co3O4)/graphene nanosheets nanocomposite as efficient electrode for supercapacitor application. The characterization techniques involved in this work are scanning electron microscopy and transmission electron microscopy for surface morphology, Raman spectroscopy and X-Ray diffraction for structural analysis. The specific capacitance of Co3O4 with multilayer graphene nanocomposite was determined to be 140 F/g (28 mF/cm2) at scan rate of 20 mV/s. The composite electrode can deliver a power density of 856 W/kg with maintaining energy density of 2.38 Wh/kg. The better performance is due to the synergistic effect of graphene and Co3O4 in the composite.

【 授权许可】

Unknown